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[RTL] Use LastEntryInSegment to speed up RtlpFindAndCommitPages. CORE-14588

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Thomas Faber 2020-02-02 12:54:19 +01:00
parent c4f736e8f4
commit 52f103c85b
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GPG key ID: 076E7C3D44720826
1 changed files with 14 additions and 9 deletions
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23
sdk/lib/rtl/heap.c
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@ -665,16 +665,21 @@ RtlpFindAndCommitPages(PHEAP Heap,
/* Calculate first and last entries */ /* Calculate first and last entries */
FirstEntry = (PHEAP_ENTRY)Address; FirstEntry = (PHEAP_ENTRY)Address;
/* Go through the entries to find the last one */ LastEntry = Segment->LastEntryInSegment;
if (PreviousUcr) if (!(LastEntry->Flags & HEAP_ENTRY_LAST_ENTRY) ||
LastEntry = (PHEAP_ENTRY)((ULONG_PTR)PreviousUcr->Address + PreviousUcr->Size); LastEntry + LastEntry->Size != FirstEntry)
else
LastEntry = &Segment->Entry;
while (!(LastEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
{ {
ASSERT(LastEntry->Size != 0); /* Go through the entries to find the last one */
LastEntry += LastEntry->Size; if (PreviousUcr)
LastEntry = (PHEAP_ENTRY)((ULONG_PTR)PreviousUcr->Address + PreviousUcr->Size);
else
LastEntry = &Segment->Entry;
while (!(LastEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
{
ASSERT(LastEntry->Size != 0);
LastEntry += LastEntry->Size;
}
} }
ASSERT((LastEntry + LastEntry->Size) == FirstEntry); ASSERT((LastEntry + LastEntry->Size) == FirstEntry);